| Patents for C22B 61 - Obtaining metals not elsewhere provided for in this subclass (484) |
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| 02/02/1993 | US5183541 Decontamination of radioactive metals |
| 12/15/1992 | US5171550 Adding anhydrous ferrous chloride and withdrawing thallium-containing salt slag |
| 11/03/1992 | US5160588 Process for recovering tellurium from copper electrolysis slime |
| 09/10/1992 | DE4207137A1 Sepg. rhenium from acid soln. contg. molybdenum - using resin or solvent fixing agent which is treated with basic soln. to recover the rhenium |
| 09/07/1992 | CA2062146A1 Process for separating rhenium from acid solutions containing molybden |
| 03/31/1992 | US5100585 Nuclear reactor by-product, crown ethers in diluents |
| 02/05/1992 | EP0468978A1 Process for recovering germanium. |
| 11/13/1991 | EP0220198B1 Preparing metal compounds by pyrolysis |
| 08/21/1991 | EP0442778A1 Process for the extraction of thallium |
| 02/20/1991 | CN1049380A Process for removing thallium from lead bullion |
| 01/09/1991 | EP0406929A1 Process for removing thallium from lead |
| 01/06/1991 | CA2020412A1 Process of removing thallium from lead bullion |
| 10/29/1990 | WO1990013677A1 Process for recovering germanium |
| 03/21/1990 | CN1007269B Removal thallium method of raw lead and refined lead |
| 05/30/1989 | CA1254718A1 Purification of cd and te by zone refining |
| 10/13/1988 | DE3710725A1 Process for the direct treatment of rhenium-containing molybdenum sulphides with ammonia |
| 06/08/1988 | EP0270453A1 Process for separating the technetium contained in an organic solvent comprising zirconium and at least one other metal such as uranium or plutonium, especially for use in reprocessing irradiated nuclear fuels |
| 05/24/1988 | CA1236981A2 Recovery of rhenium from tertiary phosphine oxide- rhenium complexes |
| 05/04/1988 | CN87106009A Removal thallium method of raw lead and refined lead |
| 03/24/1988 | DE3631196A1 Process for removing thallium from crude lead and high-purity lead |
| 03/16/1988 | CN85100737B Extraction of tungsten by using primary amine-neutral donor reagent |
| 09/01/1987 | US4690725 Purification of Cd and Te by zone refining |
| 07/14/1987 | CA1224047A1 Selective extraction of rhenium from aqueous sulfuric acid solutions |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 04/21/1987 | US4659682 Recovery of noble metal values from carbonylation residues |
| 03/25/1987 | CN85106777A Iridium's recovery and purification |
| 03/10/1987 | US4649031 Process for recovering rare metals from the combustion residue of coal by digestion |
| 02/25/1987 | CN86104680A Recovery of noble metal values from carbonylation residues |
| 02/24/1987 | CA1218239A1 Process for rhenium recovery |
| 01/28/1987 | EP0210017A1 Recovery of noble metal values from carbonylation residues |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 08/05/1986 | US4604265 Oxidation, then removal of volatilized rhenium oxide |
| 07/30/1986 | CN85100737A To extract rhenium and tungsten by using primary amine-neutral donor reagent |
| 07/08/1986 | US4599223 Separation of tungsten from rhenium |
| 07/08/1986 | US4599222 Recovery of tungsten and rhenium |
| 07/08/1986 | US4599153 Complexing with a phosphine oxide |
| 04/22/1986 | US4584185 Precipitating tungsten with hydrochloric acid, then precipitating rhenium with sulfide compound |
| 02/25/1986 | US4572823 Eluting from ion excgange resin with hydrogen chloride solution containing cadium and zinc, dichloride |
| 12/10/1985 | US4557906 Recovery of rhenium |
| 06/04/1985 | US4521381 Recovery of rhenium |
| 03/26/1985 | CA1184387A1 Process for recovering rare metals from the combustion residue of coal by digestion |
| 12/12/1984 | EP0127906A1 Process for removing heavy metallic elements suspended in a liquid |
| 10/02/1984 | CA1175240A1 Process for the recovery of metals from their ores |
| 09/11/1984 | CA1174056A1 Recovery of metal values from a metal bearing source |
| 07/25/1984 | EP0113912A2 Selective extraction of rhenium from aqueous sulfuric acid solutions |
| 04/17/1984 | US4443413 Separation of uranium from technetium in recovery of spent nuclear fuel |
| 04/10/1984 | CA1165127A1 Method and installation for treatment of waste metal and liquid dross |
| 04/13/1982 | US4324582 Process for the recovery of copper from its ores |
| 03/23/1982 | US4321089 Process for the recovery of molybdenum and rhenium from their sulfide ores |
| 03/09/1982 | US4318893 Oxidation of americium to a valence of 6 using a persulfate and silver cations in the presence of phosphoric acid |
| 01/26/1982 | US4312647 Iodine adsorbent |
| 12/16/1981 | EP0041841A1 Process for the recovery of metals from their ores |
| 09/01/1981 | CA1108090A1 Recovery of variable valency metals from compounds in voltaic cell |
| 07/14/1981 | US4278641 Distillation, ion exchanging |
| 04/08/1981 | EP0026700A1 Process for removing heavy metallic elements in suspension in a liquid |
| 03/24/1981 | CA1097925A1 Method for the recovery of actinide elements from nuclear reactor waste |
| 03/24/1981 | CA1097924A1 Method for recovering palladium and technetium values from nuclear fuel reprocessing waste solutions |
| 10/21/1980 | US4229421 Solvent extraction and reduction of nuclear fuel |
| 09/03/1980 | EP0014957A1 Process for separating technetium-99m from molybdenum-99 |
| 04/16/1980 | EP0010044A1 Process for the separation of americium from curium |
| 04/08/1980 | US4197274 Hydrazine reduces nitric acid solution of tetravalent plutonium to trivalent plutonium |
| 02/26/1980 | CA1072341A1 Bidentate organophosphorus solvent extraction process for actinide recovery and partition |
| 01/22/1980 | US4185078 Molybdenum, quaternary ammonium compound, highly aromatic solvent |
| 01/15/1980 | CA1069854A1 Method for purifying actinides which are in low oxidation states |
| 10/30/1979 | US4172775 Photochemical separation of metals in solution by precipitation following reduction or oxidation |
| 10/23/1979 | CA1064707A1 Ferric ion as a scavenging agent in a solvent extraction process |
| 08/28/1979 | US4166097 Carboxylic acid |
| 07/24/1979 | US4162231 Method for recovering palladium and technetium values from nuclear fuel reprocessing waste solutions |
| 07/24/1979 | US4162230 Method for the recovery of actinide elements from nuclear reactor waste |
| 09/26/1978 | US4116783 Method for recovering variable-valency elements and purifying sewage waters |
| 06/27/1978 | US4097267 Purification and realloying of arsenic/selenium alloys |
| 04/04/1978 | US4082547 Intermetallic compounds and metal purification |
| 08/23/1977 | US4043599 Acid preinjection to decrease instantaneous acid consumption in in-situ mining |
| 07/12/1977 | US4034861 Process and installation for recovering usable materials from waste material containing metals and non metals |
| 05/03/1977 | US4021313 Method for purifying actinides which are in low oxidation states |
| 02/01/1977 | US4006212 Process for recovery of molybdenum and rhenium from ores |
| 12/28/1976 | US4000244 Wet-chemical digestion of molybdenum sulphide containing material |
| 11/30/1976 | US3994718 Intermetallic compounds and metal purification |
| 11/23/1976 | US3993728 Bidentate organophosphorus solvent extraction process for actinide recovery and partition |
| 10/19/1976 | US3987145 Ferric ion as a scavenging agent in a solvent extraction process |
| 09/21/1976 | US3981961 Method of selective stripping of plutonium from organic solvents loaded with plutonium |
| 06/08/1976 | US3962401 Method of recovering neptunium from spent nuclear fuel |
| 05/18/1976 | US3957615 Apparatus for conducting electrolytic reactions |
| 01/13/1976 | US3932579 From hcl solution contaminated with mo and fe |